답안 #1033950

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1033950	2024-07-25T08:03:30 Z	vjudge1	Tents (JOI18_tents)	C++17	100 / 100	63 ms	70884 KB

tents

#pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>
using namespace std;

const int mod = 1e9 + 7;

long long dp[3008][3008];

long long C2(int x) {return (1LL * x * (x - 1) / 2) % mod;}

signed main() {
	int n, m; cin >> n >> m;
	for (int i = 0; i <= m; ++i) dp[0][i] = 1;
	for (int i = 0; i <= n; ++i) dp[i][0] = 1;
	for (int i = 1; i <= n; ++i) for (int j = 1; j <= m; ++j) 
		dp[i][j] = (dp[i][j - 1] + dp[i - 1][j - 1] * i * 4 + dp[i - 2][j - 1] * C2(i) + dp[i - 1][j - 2] * i * (j - 1)) % mod;
	cout << (dp[n][m] + mod -1 ) % mod;
}

Subtask #1

48.0 / 48.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	0 ms	2396 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	6492 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	8540 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	2 ms	8540 KB	Output is correct

Subtask #2

52.0 / 52.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	1 ms	2396 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	0 ms	2396 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	2396 KB	Output is correct
8	Correct	1 ms	6492 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	8540 KB	Output is correct
11	Correct	1 ms	2396 KB	Output is correct
12	Correct	2 ms	8540 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	4 ms	24932 KB	Output is correct
15	Correct	42 ms	58716 KB	Output is correct
16	Correct	2 ms	6492 KB	Output is correct
17	Correct	7 ms	16988 KB	Output is correct
18	Correct	11 ms	25684 KB	Output is correct
19	Correct	48 ms	64852 KB	Output is correct
20	Correct	38 ms	54100 KB	Output is correct
21	Correct	23 ms	37468 KB	Output is correct
22	Correct	26 ms	44052 KB	Output is correct
23	Correct	18 ms	42584 KB	Output is correct
24	Correct	63 ms	70884 KB	Output is correct
25	Correct	44 ms	61268 KB	Output is correct
26	Correct	51 ms	66564 KB	Output is correct
27	Correct	57 ms	69192 KB	Output is correct